A window sash is really a dual-objective window feature. 1st, it reinforces the glass window pane, adding to the overall security of a window. Second, by creating a barrier between the window glass and frame, a sash forms an airtight suit that helps to keep out drafts and pests, adding https://led-home-lighting80011.bloggactif.com/37168181/5-simple-statements-about-sash-window-draught-proofing-explained